136408497 has 4 divisors (see below), whose sum is σ = 181878000. Its totient is φ = 90938996.

The previous prime is 136408487. The next prime is 136408499. The reversal of 136408497 is 794804631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136408497 - 2²⁰ = 135359921 is a prime.

It is a super-3 number, since 3×136408497³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (136408499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22734747 + ... + 22734752.

It is an arithmetic number, because the mean of its divisors is an integer number (45469500).

Almost surely, 2^136408497 is an apocalyptic number.

It is an amenable number.

136408497 is a deficient number, since it is larger than the sum of its proper divisors (45469503).

136408497 is an equidigital number, since it uses as much as digits as its factorization.

136408497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45469502.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 136408497 is about 11679.4048221645. The cubic root of 136408497 is about 514.7706862331.

The spelling of 136408497 in words is "one hundred thirty-six million, four hundred eight thousand, four hundred ninety-seven".